HP-UX Reference (11i v2 04/09) - 7 Device (Special) Files, 9 General Information, Index (vol 10)

p
ptem(7) ptem(7)
upstream with the jwinsize structure. If the values are zero,
ptem sends an M_IOCNAK
message upstream.
• When an
M_IOCTL message of type
TIOCGWINSZ is received on its write queue and if the
values in the
winsize structure in ptem are not zero,
ptem sends an M_IOCACK message
upstream with the
winsize structure. If the values are zero,
ptem sends an M_IOCNAK
message upstream.
• When an
M_IOCTL message of type TIOCSWINSZ
is received in its write queue, ptem saves
the information passed to it in the
winsize
structure and sends an M_PCSIG (with the signal
number set to
SIGWINCH) upstream to the pty slave process if the window size is changed.
• When an
M_IOCTL message of type TIOCGWINSZ
is received on its read queue and if the
values in the
winsize structure in ptem are not zero,
ptem sends an M_IOCACK message
downstream with the
winsize structure. If the values are zero,
ptem sends an M_IOCNAK
message downstream.
• When an
M_IOCTL message of type TIOCSWINSZ
is received in its read queue, ptem saves
the information passed to it in the
winsize
structure and sends an M_PCSIG (with the signal
number is set to
SIGWINCH) upstream to the pty slave process if the window size is changed.
• All other messages not mentioned above are passed to the next module or driver.
AUTHOR
ptem was developed by HP.
SEE ALSO
ioctl(2), streamio(7), ptm(7), pts(7), ldterm(7).
HP-UX 11i Version 2: September 2004 − 2 − Hewlett-Packard Company Section 7−−107